MC68HC11K1CFN4 Freescale Semiconductor, MC68HC11K1CFN4 Datasheet - Page 49

• Manufacturer Part Number: MC68HC11K1CFN4
• Description: IC MCU 640 EEPROM 4MHZ 84-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11K1CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Type: ROMless
• Eeprom Size: 640 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 84-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Program Memory Size: -

7 Serial Communications Interface
M68HC11 K Series
MC68HC11KTS/D
The SCI, a universal asynchronous receiver transmitter (UART) serial communications interface, is one
of two independent serial I/O subsystems in M68HC11 K-series MCUs. Rearranging registers and con-
trol bits used in previous M68HC11 family devices has enhanced the existing SCI system and added
new features, which include the following:
The enhanced baud rate generator is shown in the following diagram. Refer to Table 7 for standard val-
ues.
EXTAL
• A 13-bit modulus prescaler that allows greater baud rate control
• A new idle mode detect, independent of preceding serial data
• A receiver active flag
• Hardware parity for both transmitter and receiver
SCBDH/L SCI BAUD CONTROL
13-BIT COUNTER
13-BIT COMPARE
Freescale Semiconductor, Inc.
Figure 9 SCI Baud Generator Circuit Diagram
For More Information On This Product,
RESET
=
Go to: www.freescale.com
2
PHASE 2 CLOCK
INTERNAL
SYNCH
16
RECEIVER
BAUD RATE
CLOCK
TRANSMITTER
BAUD RATE
CLOCK
MOTOROLA
49